Syndactylism and Polydactylism. Presented by Charles L. Heaton, MD, and Edward Shmunes, MD.Polydactylism and syndactylism, or both, are evident in this patient, a 32-year-old Negro woman, who also has nummular eczema. Several members of her family are affected as shown in the Figure: 1, the patient shows syndactylism between the fourth and fifth toes bilaterally and has bifid fifth toes; 2, the 17-month-old daughter of the patient has a bifid digit on the right foot only and syndactylism of the fourth and fifth digits of the right foot; 3, the 13-year-old daughter of the patient exhibits syndactylism of the second and third toes of the right foot only; 4, the 15-year-old son of the patient shows polydactylism of the fifth digit of each hand; and 5 and 6, a paternal aunt and uncle of the patient have polydactylism of the fifth digit of